根据Shiny中的selectInput字段显示不同的标记

如何解决根据Shiny中的selectInput字段显示不同的标记

我正在尝试在地图上显示标记，其外观取决于selectInput。全局想法是用户可以单击地图上的不同位置，以搜索理想地点。最终，当选择的是好的，他通过点击actionbutton，显示标记验证的位置。在不添加图标形状的情况下，一切正常，但是当我将图标属性添加到addMarkers行时，出现错误消息：objet de type'closure'...，我尝试了几种方法，具体取决于Observe，eventReactive等。 。但是我没有想法，任何帮助将不胜感激！谢谢！

library(shiny)
library(shinythemes)
library(leaflet)

icon.shapes <- c("cylindrical","spherical","cubic")

ui <- navbarPage(
      fluidPage(theme = shinytheme("cerulean"),wellPanel(tags$style(type="text/css",'#leftPanel { width:300px; float:left;}'),id = "leftPanel",selectInput("icon_shape","Icon shape :",icon.shapes),),mainPanel(                          
                      tabsetPanel(
                        tabPanel("Location",leafletOutput("map")),)
           )
)
  )

leafletOutput("map",width = "100%",height = "100%")

server = function(input,output,session) {

output$map <- renderLeaflet({
    leaflet() %>%
      addProviderTiles("CartoDB.Positron")%>%
      setView(lng = -4,lat= 52.54,zoom = 7)
  })

observeEvent(input$map_click,{
    click <- input$map_click
    text<-paste("Lattitude ",click$lat,"Longtitude ",click$lng)
    updateNumericInput(session,'lat',value=input$map_click$lat)
    updateNumericInput(session,'lng',value=input$map_click$lng)
    proxy <- leafletProxy("map")
    proxy %>% clearPopups() %>%
      addPopups(click$lng,text)
    proxy <- leafletProxy("map")
    proxy %>% clearShapes() %>% 
      addCircles(click$lng,click$lat)
  })

  cageIcons <- reactive({
    
    icons(
    iconUrl = ifelse(input$icon_shape == "Cylindrical","http://www.pngmart.com/files/7/Cylinder-PNG-File.png",ifelse(input$icon_shape == "Sphérical","https://img.pngio.com/sphere-d-png-sphere-3d-png-transparent-png-6604207-free-3d-sphere-png-840_614.png","https://www.pinclipart.com/picdir/middle/7-75687_shapes-clipart-cube-pink-cube-png-transparent-png.png")
    ),iconWidth = 38,iconHeight = 95,iconAnchorX = 22,iconAnchorY = 94,)
  return(icons)
  })

observeEvent(input$submit_config,{
    proxy <- leafletProxy("map")
    proxy %>% 
      addMarkers(input$map_click$lng,input$map_click$lat,icon=icons)
  })
}

shinyApp(ui = ui,server = server)